1. Measurement
“The most remarkable discovery ever made by a scientists was science itself.”
Jacob Bronowski

2. Measurements Gives meaning to the observation
are expressed with numbers and units of measure.
Examples:
25 yards
10 seconds
38 degrees Celsius
2,580 miles
20 kilometers

3. Instruments and what they measure
Meter stick (ruler)
Length
Triple Beam Balance (scale)
Mass (weight)
Thermometer
Temperature
Stopwatch
Time
Graduated Cylinder
Volume

4. Scientific Communication
Most scientific studies and experiments use a standard system of units called “Le Systéme International d’Unités” or SI.
Modern metric
10 is the base unit.

5. Length Distance between two points
Ex: 1.5 miles from HLMS to Rooster’s
Units of length...
Millimeter (mm), Centimeter (cm), Meter (m), Kilometer (km)

6. Mass The amount of matter in an object Units of mass
Ex: The rock has a mass of 23 grams
Units of mass
milligrams (mg), grams (g), kilograms (kg)
Weight is a measure of the gravitational force on an object.

7. Would my weight change if I traveled to the Moon? Would my mass change?

8. Area
Area is the amount of surface included within a set of boundaries.
Expressed in square units of length (m2)
A= Length x Width

9. Volume The amount of space that an object occupies
Ex: the pebble has a volume of 4 mL
How is it found?
Irregular objects.....with a graduated cylinder
Regular objects By measuring

10. Irregular object Put water into cylinder measure volume of water
place object in cylinder
re-measure volume of water
subtract volumes
Measured in milliliters (mL)

11. Example... Amount of water in Graduated Cylinder = 50 mL
Amount of water after pebble is placed in = 55 mL
Volume of pebble = _____

12. Regular Objects L H W Measure: Length Width Height Calculate:
V= L x W x H (cm³) L H W

13. Example....
V = L x W x H
= 4.0 x 3.2 x 12.3
= cm³